iX V6.5 (30391-90011)

Chapter 11 507

B-Tree Indices

External Commands and Utilities Affected

DBINFO

DBINFO has new modes 113 and 209.

Mode 113

DBINFO mode 113 reports the wildcard character in use for the database, and the value of

BTREEMODE1. The qualiﬁer is ignored.

The output buffer for mode 113 must be at least 32 bytes in size and is shown below

(elements are 16-bits wide and are counted starting with 1):

Element Contents

1 0 if BTREEMODE1 is off in the root ﬁle

1 if BTREEMODE1 is on in the root ﬁle

2 The ﬁrst byte (8 bits) is always 0. The second byte (8 bits) represents

where

is the current wildcard character. For example, if the current

wildcard character is @, the element's hex value will be $0040, or decimal

64.

3 Highest B-Tree index argument version supported (currently 0)

4 Number of sets with B-Tree indices attached

5 0 if BTREEMODE1 is OFF for current DBOPEN

1 if BTREEMODE1 is ON for current DBOPEN

6 The ﬁrst byte (8 bits) is always 0 for current DBOPEN. The second byte (8

bits) represents

, where

is the current wildcard character.

7-16 (reserved)

Mode 209

DBINFO mode 209 reports whether or not a data set has a B-Tree index attached. The

qualiﬁer is a data set number or name. The output buffer is required to be 64 bytes (32

halfwords) or larger. The output buffer for mode 209 is shown below (elements are 16-bits

wide, and are counted starting with 1):

Element Contents

1 0 if no B-Tree index exists 1 if B-Tree index exists

2 1 if attached B-Tree is not damaged or index does not exist

3-32 For internal use